RK
Sirius Black cannabis seeds packaging β€” Royal King Seeds the UK
Indica
THC 24%
🎨 Creative
IndicaFeminizedIn Stock

Sirius Black Feminized

Feminized PhotoperiodSee Lab Report β†’

Grow Sirius Black Feminized in the UK. Indica genetics testing at 24% THC. Known for euphoric, creative effects. Ships discreetly UK-wide with germination guarantee.

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Β£10.26
1
πŸ‡¦πŸ‡ΊFree AU Delivery
🌱Germination Promise
πŸ”’Unmarked Packaging

About Sirius Black Feminized

Where you grow Sirius Black in the UK matters, but less than when. Britain has one temperate maritime climate and a real north-south gradient: the south coast runs a season roughly a fortnight longer at each end than Scotland and upland Wales. Outdoors the limiting factor is not heat, it is the wet finish β€” September and October rain sitting on dense flower is what starts botrytis, and it is the most common reason a UK outdoor crop is lost. That makes the 9-10 weeks flowering window and bud structure the two figures worth checking before anything else. Indoors none of it applies: you set the daylength, the temperature and the humidity, and Sirius Black can be grown anywhere in the country on its merits.

UK growers face a fairly consistent set of pressures. Damp late season: botrytis in dense flower from September is the main risk β€” favour open bud structure and keep airflow moving. Indoors: spider mite and thrips are the usual arrivals; humidity above 60% in late bloom is what turns a small problem into a lost crop. Slugs take seedlings outdoors in a wet spring more reliably than any insect.

Flavour, Aroma, and Experience

The sensory arc of Sirius Black unfolds in stages. Initial inhalation at 24% THC brings a warm peppery spice that tingles at the back of the throat. The euphoric, creative effects emerge within minutes, beginning as a pleasant heaviness behind the eyes that migrates downward through the shoulders, chest, and limbs. By the fifteen-minute mark, a deep physical stillness sets in β€” not sedation exactly, but a reluctance to move that makes the couch remarkably appealing. Duration runs 2-3 hours at moderate doses. The myrcene secondary terpene adds a distinct layer: additional body depth that reinforces the physical dimension.

Terpene Breakdown

Primary: Caryophyllene Β· Secondary: Myrcene Β· Tertiary: Bisabolol. This particular terpene trio appears frequently in award-winning cultivars and produces a nose that most UK growers find immediately appealing when jars are first opened after curing. The caryophyllene dominance anchors the aroma, myrcene provides mid-range character, and bisabolol contributes a subtle background note that distinguishes this strain from others sharing the same primary terpene.

Suitability and Recommendations

Who grows Sirius Black successfully? Indoor growers seeking full control over their harvest timeline. Outdoor cultivators who want to decide exactly when flowering begins. Anyone with the space and patience to vegetate this plant to its full potential before triggering bloom. Difficulty is rated intermediate, meaning a moderate learning curve that rewards attention without demanding laboratory-grade conditions. Delivered UK-wide in discreet, unbranded packaging with germination guarantee included.

Effects

πŸ€—Euphoric
74% of people reported feeling Euphoric
🀩Creative
70% of people reported feeling Creative
😌Relaxed
58% of people reported feeling Relaxed
😴Sleepy
58% of people reported feeling Sleepy
😊Happy
45% of people reported feeling Happy
🀀Hungry
41% of people reported feeling Hungry
🧘Calm
33% of people reported feeling Calm
🌿Stress Relief
20% of people reported feeling Stress Relief
πŸ’†Body High
17% of people reported feeling Body High

Strain Type

Indica 83%Sativa 17%

Strain Data Sheet

🧬THC24% - 27% (High)
🌿LineageIndica-Dominant Hybrid (Undisclosed Lineage)
πŸ”¬TypeFeminized Indica
🌑ClimateCool–temperate / continental
πŸ“…HarvestLate Sept – Oct, UK outdoor (typical)
πŸ“Height90 – 120 cm (typical)
βš–οΈYieldMedium – High
🏠Yield Indoor400-500 g/m2
🌳Yield Outdoor400-500 g/plant
⏱Flowering Time9-10 weeks

Packaging

Resealable +
RK
Royal King Seeds
Photoperiod
Feminized Premium
Seeds
Premium Genetics
Protective vial
Resealable +
Royal King Seeds supplies seeds as adult novelty collectibles and for genetic preservation. Purchasers must comply with all applicable UK Commonwealth, state, and territory legislation.
1
Sirius Black Feminized
royalkingseeds.co.uk
IG
FB
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πŸ”’Sealed for authenticity
πŸ’§Waterproof coating
πŸ›‘οΈAluminium interior lining
🏷️Protective sticker
πŸ“±QR code verification
πŸ”’Scratchable serial number

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Sirius Black Feminized β€” Breeder Information

Royal King Genetics

Bred and stabilised in-house by Royal King Genetics β€” our internal breeding team. Every batch is QC'd and germ-tested above 99% before it ships. Read the full breeding process and about page.

Stabilisation Level
F4
Generations
4+
Breeding Programme
Royal King Genetics Filial Programme β€” four-generation pheno fixing
Stabilisation Notes β€” What This Means for Your Grow

Sirius Black runs through our F4 programme. Four cycles of phenotype selection have removed the worst of the trait variation; what is left is a tight, predictable population for production.

Breeding Goal

Cull off-type phenos in Sirius Black through filial selection.

Selection Focus

Chosen for resin output, a low-slung stature and a clean indica terpene fingerprint.

Pollen / Mother Source

Royal King Genetics select-mother programme β€” pollen drawn from an internally maintained reversed-female line.

Last Batch QC Verified
14 March 2026Β· 99%+ germination